better target support on resizable

src/shared/behaviors/Resizable.js

@@ -7,45 +7,48 @@
 
 (function (scope) {
 
-	var _cache = [];
 	var _instances = [];
 	var _il = 0;
 	var _backoff = 0;
 	var _backoff_inc = 200;
 	var _backoff_max = 2000;
 
-	function _addInstance(instance) {
-		_instances.push(instance);
-		_cache.push({
-			width:instance.offsetWidth,
-			height:instance.offsetHeight,
+	function _addInstance(instance, target) {
+		_instances.push({
+			target:target,
+			instance: instance,
+			width:target.offsetWidth,
+			height:target.offsetHeight,
 		});
 		_il++;
 		requestAnimationFrame(_measure);
 	}
 
 	function _removeInstance(instance) {
-		_instances.splice(_instances.indexOf(instance), 1);
-		_il--;
+		_instances.filter(function(meta) {
+			return meta.instance === instance;
+		}).forEach(function(target) {
+			_instances.splice(_instances.indexOf(target), 1);
+			_il--;
+		});
 	}
 
 	function _measure() {
 		_backoff += _backoff_inc;
 		if (_backoff > _backoff_max) _backoff = _backoff_max;
 
 		for(var i=0; i<_il; i++) {
-			var inst = _instances[i];
-			var w = inst.offsetWidth;
-			var h = inst.offsetHeight;
-			var cache = _cache[i];
-			if (cache.width !== w) {
-				cache.width = w;
-				inst.elementResize(w,null);
+			var meta = _instances[i];
+			var w = meta.target.offsetWidth;
+			var h = meta.target.offsetHeight;
+			if (meta.width !== w) {
+				meta.width = w;
+				meta.instance.elementResize(w,null,meta.target);
 				_backoff = 0;
 			}
-			if (cache.height !== h) {
-				cache.height = h;
-				inst.elementResize(null, h);
+			if (meta.height !== h) {
+				meta.height = h;
+				meta.instance.elementResize(null, h, meta.target);
 				_backoff = 0;
 			}
 		}
@@ -62,15 +65,15 @@
 			resizeTarget:{
 				type:Object,
 				value: function() { return this; }
-			}
+			},
 		},
 
 		attached:function() {
-			_addInstance(this.resizeTarget);
+			_addInstance(this, this.resizeTarget);
 		},
 
 		detached:function() {
-			_removeInstance(this.resizeTarget);
+			_removeInstance(this);
 		},
 
 		elementResize: function(e) {